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[Changes in plasma myoglobin levels in ischemic heart disease]
Giornale Di Clinica Medica
|December 1, 1989
Summary
Serum myoglobin is a sensitive early indicator for diagnosing acute myocardial infarction (heart attack). Levels rise within hours of necrosis, peaking at 10 hours, unlike CK and MBCK.
Area of Science:
- Cardiology
- Biochemistry
Background:
- Early diagnosis of acute myocardial infarction (AMI) is crucial for timely intervention.
- Biomarkers like creatine kinase (CK) and MB isoenzyme (MBCK) are established indicators, but their sensitivity in the earliest hours is limited.
Purpose of the Study:
- To evaluate serum myoglobin levels as an early diagnostic index for AMI.
- To compare the sensitivity of myoglobin with CK and MBCK in AMI diagnosis.
Main Methods:
- Serum myoglobin, CK, and MBCK levels were measured in 62 patients (38 with AMI, 16 with angina pectoris, 8 with heart failure) and 20 healthy volunteers.
- Patients with AMI were categorized by time to admission (0-6, 6-12, 12-24 hours).
- Radioimmunoassay was used for myoglobin; enzymatic methods for CK and MBCK.
Main Results:
- Serum myoglobin levels were significantly elevated in all AMI patients.
- Myoglobin levels rose early in AMI, peaking at 10 hours and normalizing within 20 hours.
- CK and MBCK levels were significantly elevated only after 6 hours post-necrosis; no significant myoglobin changes were observed in angina or healthy volunteers.
Conclusions:
- Serum myoglobin is a highly sensitive and early biomarker for acute myocardial infarction.
- Myoglobin offers a diagnostic advantage over CK and MBCK in the initial hours following myocardial necrosis.